Telautograph.



G. S. TIFFANY.

TELAUTOGRAPH.

APPLIOATION FILED MAY16,1907.

954,062. Patented Apr. 5, 1910,

3 SEEETSSHBET lv w mr 9 a a Maw- W G. S TIFFANY. TELAUTQGRAPH.APPLICATION FILED MAY 16,1907

Patented Apr. 5, 1910 3 SHEETS-SHEET 2.

G. S, TIFFANY. TELAUTOGRAPH.

APPLICATION FILED MAY 16, 1907.

954,062. Patented Apr. 5, 1910.

" a sums-sum BEST AVAILABLE COPY UNITED-STATES, PATENT oEEIoE.

GEORGE STEELE TIFFANY,OP*SUKMIT, NEW JERSEY, ASSIGNOR TO THE GRAY HA-TIONAL TELAUTOGRAPH COMBZANY, OF NEW YORK, N. Y., A CORPORATION" OFVIRGINIA.

'rELAUnoGnAPH.

PatentemApr. 5, 1910.

.Original appIication filed Rgbruary 5, 1906, Serial il'o. 299,413.Divided and this application filed May 16,

'1907. Serial No. 374,037. e

0 all il ltom it may concern:

Be it known that I, GEORGE S. TIFFANY, a citizen of the United States,residing at Summit, county of Union, and State of New Jersey, haveinvented certain new and useful Improvements in Telanlxigraphs, fullydescribed and represented in the following specification and the.accompanying drawings, formin a part of' the same.

The invention of this application division of my application filedFebruary 5, 1906, Serial No. 299,413) relates to improvements in relaysfor electric circuits.

'Although devised with especial reference to telautographic systems, theimprovements of the present invention are capable of application toother systems emploving a main line circuit and another circuit thecondition of which is controlled thereby through a .relay, as will beapparent from the detailed description of the present invention, whichwill now be given in conneclion with a telautographic system.

In the accompanying draWings-Figures l and 2 illustrate, mainly indiagram, two

stations of a telautographic system, each equipped with a. relayembodying the present invention. Figs. 3, 4 and 5 are details, upon anenlarged scale, of the master switch with which each station isprovided. Fig.

(3 is a vertical section, on an enlarged scale,

of the relay illustrated in Figs. 1 and 2.

Fig. 7 is a bottom view of said relay; and

Fig. 8 is a cross sectioinon the line B of Fig. 6, of a circuit closingdevice forming part of the relay.

The telautogra 'ihic apparatus illustrated in the drawings is of thetype in which the movements of the receiving pen of the distant stationin unison with the transmitting tracer of the station from which mes--sages are being transmitted to said distantstation, are effected byvariations in the strength of the currents sent to line from thetransmitting instrument to the receiving instrument, such variations incurrent strength being in turn effected. by and corresponding to themovements of the trans mitting tracer. The particular apparatusillustrated in said drawings is identical with that illustrated anddescribed in detail in my prior application aforesaid, except that heresonie'of the devices and circuit connections which appear in thedrawings of my said prior application have been omitted for clearnessand because illustration thereof in the present case is unnecessary.E'xcept'for the relay constituting the present invention and thecircuits and devices controlled thereby, the telautographic ap aratusshown herein need only be describe briefly, reference being made to ,mysaid rior application for a more detailed description of it.

Each station of the telautographic apparatus shown comprises atransmitting instru- -ment (designated 1 inFig. land 1 in Fig. 2), areceiving instrument (desi nated 2. in Fig. 1 and 2? in Fig. 2), anoscillatory master switch (designated 3 in Fig. 1 and 3 in Fig. 2,) forconnecting the transmitter or receiver of its station with the receiveror transmitter, respectively, of another station, or connectingtogether-the receiver and transmitter of its own station for testing,and a battery (designated at in Fig. 1 and 4 in Fig. 2) from which, whenthe station is transmitting, currents, varying in strength in accordancewith the movements of the trans? initting tracer, are shuntedinto the main line.

I strumeut of Fig. l and the receiving instrument of Fig. 2 will beselected for such de scription. The same reference numerals will beapplied to corresponding parts in Fi s. l and 2, except that, forconvenience of de script-ion, reference letter a will be added to thereference numerals'in Fig. 2. i

The transmitting instrument (Fig. 1) is provided withthe usualdepressible writing platen 5 on which the writing instrument or tracer Grests in transmitting, the usual paper strip (not shown) on which thetracer makes its record being fed over this table by paper shiftingmechanism such as shown and described in my prior application aforesaid.The tracer (3 is pivotally mounted in the con verging ends of a pair ofhinged arms 7, 8, the opposite ends of which are pivoted to the outerends of a pair of arms 9,. l0 pivotally (from which they are suitablyinsulated) 5 hav ng at their outer ends spring plates in rlili arejournaled roller contacts 1%, 15, actively, which, as the arms or bellcrank rs 9, 12 and 10, 13 are oscillated by the lm-i felllel'lll oi thetransmitting tracer (3, 1s :v" e back and forth between the-opposite sof a pair of rheostats 16, 1?, respecrely. These rheostats are incircuit at their :positxe ends with battery 4 so that when the rcuitsconnecting them with said battery e closed, currents are shunted throughthe eostats 16, 17 and arms 12, 13 into the main line circuits leadingfrom the transmitting instrument to the distant receiver; these currentsvarying in strength in accordance with the positions assumed by theroller contacts 14, 15 between the ends of said rheostats. One end ofrheostat 16 is at all times connected by wires 18, 19 with the negativepole of battery 1, and the corresponding end of rheostat- 17 is alsoconnected therewith by wires 20, 19; this pole of thebattery beinggrounded, as shown, so that the currents supplied by said battery to themain 1 ne circuits, or, when it is serving as the local battery of thereceiver, are positive. Normally the master switch 3 occupies theposition in which it is shown in 3, and in this position of the masterswitch the transmitter of the station is off and the receiver of thatstation is on, or ready to receive messages, and in this position of theswitch the opposite or smaller ends of the rheostats 16, 17 are notconnected with the positive pole of battery 4;. When, however, themaster switch is rocked forward from the position shown in Fig. 3 to theosition shown in Fig. 4-, these ends of the r eostats 16, 17 areconnected with the positive pole of battery 1-,rheostat 16 by wires 22,23, contacts 2 1 25, contact plate 26 (carried by switch 3 and which inthis position of said switch electrically connects said contacts 24, andwire 27 to the positive pole of battery 1, and the rheostat 17 by wires28, 23, contact 24, plate 26, contact 25 and wire 27 to the positivepole of battery 4. In this position of the master switch also twocontact plates 29, 30 carried by and suitably insulated from masterswitch 3 close the main line circuits from the transmitting instrumentto the re} ceivin'g instrument of the distant station,

plate 29 by engaging and electrically connecting a pair of upper andlower contacts 31, 32 in the right hand main line circuit, and plate 30by en aging and electrically connecting a pair 0 upper and lower conitts 33 3 1 in the left hand main line ciri. with the switch 3 in thisposition, the ht hand main line circuit from the transting station(Fig. 1) consists of arm 12,

wire 35, right secondary winding 36 of an induction coil, (the functionof which Will be hereinafter pointed out) wire 37, contact 31, plate 29,contact 32, and wire 38 leading to the right hand side of the receivinginstrument (Fig. 2) while the left hand main line circuit consists ofarm 13, wire 39, left secondary winding 10 of the induction coil justreferred to, wire 11, contact 33, plate 30, contact 3 1, and wire 42leading to the left hand side of the receiving instrinnent (Fig. 2).

At the time the master switch 3 of Fig. 1 is thus shifted totransmitting position, the master switch 3 of the distant station beingin its normal position,-that is, with the transmitter of that stationoff and the receiver thereon on,the contact plate 26 of switch 3 will beout of engagement with contacts 24, 25 so that the circuits from battery4* through rheostats 16", 17 of that station (Fig. 2) are open. In thisposition of the masterswitch 3*, also, its plates 29, 30 are lowered outof engagement with upper contactsill", 33 respectively, and intoengagement with the two contacts 43 11*, respectively, (see Fig. l),contact 13 being electrically connected by plate 29 with under contact32, and contact 44 by plate 30* with under contact 31.

\Vith the master switch 3 in this position, the right hand main linecircuit of Fig. l entering and passing through the receiving instrument2 of Fig. '2, consists of line wire 38" (continuation of wire 38 of Fig.1), contact 32-, plate 29 of master switch 3, contact 13, wire =15,vertically movable coil 16 on the right hand side of the receivinginstrument, and wires 17, 48 leading thence to ground at 19 (Fig. 2) andback to the negative pole of battery 4; (Fig. 1); while the left handain line circuit consists of wire 4C2 (con ainuation of wire 42 of Fig.1), contact- 3 1, plate 30* of mastelr switch 3, contact 141, wire 50leading therefrom through. the winding of a combination relay 51(embodying the present invention), wire 52 leading therefrom to avertically movable coil 53 at the left hand side of the re ceiver, andwires 54: and 48 leading thence to ground at 49 (Fig. 2) and back to thenegativepole of battery 1- (Fig. 1). The coils 46, 53*, just referredto, fit loosely over the vertical cores 55 of the field. magnet 56, andnormally are at the upper ends of said cores, in which position they areheld by chains 57 and springs 58.

In the'normal position, just described, of the master switch 3, with thetransmitter off and the receiver on, battery 4: of Fig. 2 serves as alocal battery for the receiving instrument, one of thefunctionsperformed by it being the energization of mag net 56, thecircuit throughwhich it does this worlr consisting of wire 27 from the'application, locks master switch 3" in its normal position while current15 on the lett hand main line circuit), wire (31: to ma net 56,-W11'6-62 leading from said magnet to a contact plate 63 carried by butinsulated.

from "armature 04: of relay 51, contact- 65 described, will then be" asfollows: The crater of thetransnntter transmitter thereof] on masterswtch 3* of Fig.

- is thus movedlaterally from unison pcfor plate 63, and wire (36leading therefrom to the negative pole of .iattery q and ground. lVhenthe master switch 13 in the normal position just described and currentis passing over the left hand main line rircuit from battery at of the tansmittiug instrument (Fig. l), the 51, through which this circuitpasses, wi l he energized,

relay and attractit-s armature M which will cause plate 63 to engagecontact and thus close the circuit just described through magnet 56 frombattery 4, and this local circuit willrenia'xn closed so long as thereis any current on the left hand main line circuit. 1 "With the masterswitch 25 of ig. iii} the position shown in. Fig. -l-, that is' sothatthe receiver. of that sttz. 'on is oil ,nd the and with in t e positionv t e reshown in Fig, 3;that is, lnitter of tl'iat"stati(),il--.isoceiver thereof 011", the in: cults from. the transinitfter lt the.ceiver 01 Fig. 2 will. be closed with current passing over them frombattery The operation of the am atus, briefly Fig.1) will thetransmitting tracer from its restin' place in unison position (see Fig.2}. and move it laterally to position over the writing platen 5, thenlower it so that its point will rest upon the paper strip {not shown)passing oversaid platen, and then move the 'tracer over the paper toinscribe thereon the message to-be transmitted. the tr o r 8 ion andover the surface of the paper, the roller contacts'lel, 15 will be'movedby the arms 9,

,12 and 10, 13, respectively, to dififerent posh tions betweentheopposite ends of the rheostats 1.6, 17, respectively. the roller contacts are thus moved, currents, varyingin strength in accordance withthe dill'erent positions assumed by said rollercontacts along therheostats 1 6, 17, will be shunted through the said rheostats and thearms 19, 18 into the main line circuits, heretofore described,

leadingto the receiving. instrument 2 of 2 and assing through thevertically movable coils 415 and 53, cell 40 beiu included in therighthand main line circuit which is supplied with current throughrhcostat 11' and arm 12, While coil is included in the left hand mainlinecircuit which is supplied with'current through rheostat 1? and arm"the operation of 1 of this circuit so as to lo:

l6. coils 46 and 53 will, as is well understood. by those :t'an'uharwith telautograplnc appara*=f;us, with the springs 58, control theposition of the coils 46, 5 3 vertically on the cores 55 oi. the fieldmagnet 56, these coils The currents thus passing through the being moveddownwardly as the strength of the currents on the main lines increases.and,

upwardly as said currents (lCCI'GHbO. in strength. the coils are thusmoved vertically, they will, through the chains 57 and segmental pulleysol (around which two urns oi the chains are taken), move the thereof isdeemed unnecessary here, except i in so far as the combination relay 51,and.

the parts cont-rolled thereby, are concerned,

which will presently be described in detail.

Llo as the right hand main line circuit is concerned, it performs,during the transmitting operation, simply the function of controllingthe vertical. movements of the coil 46, The left hand main line circuit,

-however TiElfOlIllS not 0111 i the function of controlling the verticalmovements of its coil fii-lfl'hut also the function-of controlling, though the combination relay 51, various local circuits in the receivinginstrument, in-

cluding that from battery 46 (which is a battery when the station isrcce1v-= l i'cal "l for energizing field magnet 56. As

soon as cin'rcht: traverses the left main line 1 ci cuit of i, relay 51is, of course, en and attracts its armature '(lae thus the local circuitheiore referred td,

1 a l,-consisting of Wires 2?, 59, loch magnet 80, wire Gl, field magnet56, coi'itacts ea", 6, and wire (56, to battery 1, with the result isenergized for 4-43, 53. Lock by the closing the uuister switch 3 againstmovement from normal position. as "a ly des ribed in my aforesaid priorapplication. .inis local circuit remains closed so long as there anycurrent on the left hand main ine wires, and as soon as the lcl't mainline :uit is broken, by shifting the i switch Jifrom the positionindicated in Fig.

that sa fl magnet is 4- to its in Jlllll. position indicated in Fig. 53.I

this local circ it is, of course, broken.

The vertical movement of the coils 46, ill" controls the lateralmovements of the receiv ing pen so that theywill correspond with tlulateral movements of the transmitting tracer,

magnet is energized and deie'nergized,

10 controlled by the combination relay 51.

The armature 74* of this pen lifter magnet has depending arms pivotallyconnected at their lower ends to a bracket 7 5 on'which said magnet issupported, so that, as saig sai armature will swing inwardly andoutwardly over the cores of the magnet. The armature is held normally inits retracted position, from over the cores of magnet 73",

by a spring (notshown), aud'is provided with a rod ?6 against which thepen arms 70", 71 rest. In the retracted pcsition of the armature 74:and, therefore, of this penarm rest 76, the receiving pen 72, when atunison, will lie in its resting place (an opening. in an, ink bottle, asdescribed in my prior appl cation aforesaid), and when over its writingficld, will rest against the surface of the paperstripon which it is torecord the message received. When, however, the pen lifter magnet 7 3 isenergized, its armature 74, and, therefore, the pen-arm rest 76, willswing outwardly over the cores of said magnet and thereby move pen arms70*, 71, and, therefore, the receiving pen 72, outwardly so as to movesaid receiving pen outwardly from its place of rest at unison or awayfrom contact with the paper strip on which the message is beingrecorded.

The energization of magnet 73 is effected by battery 4*, in the closedcondition of the left hand main line circuit, through a branch circuitfrom the field magnet circuit just described, consisting of wire 77leading from the winding of magnet 56 to magnet '73,

wire 78 leading from said magnet 73 to a contact 79 (fixed at one end inone end of a tube 80 and the opposite end of which contact is flexibleand loose), a second contact 81. rigidly fixed in the opposite end ofsaid tube 80 (and. between which and the free end of contact 79 there isa certain amount of looseness so that the free end of contact 79. mayhave a certain amount of play relatively to contact 81 with which,

however, it is normally in engagement), and wires 82, 83 leading fromcontact 81* to the wire 62 of, the circuit of field magnet 56*. Tube 80is preferably of glass and is closed 60 to the atmosphere so as toprevent oxidation of its contacts 79, 81

From this construction it results that on the closing of the left mainline circuit, by the shifting of the master switch 3 (Fig. 1)

to the position shown in Fig. 4, the relay 51 (Fig. 2) is energized andthe circuit for field magnet 56" thus closed by the movement of contactplate 63 into enga ement with contact 65, as before described, thebranch circiiit just described through pen lifting magtransmittingtracer 6 being then moved from unison position to a position above thewriting platen 5, the receivin pen 72' will, following the movements 0the transmitting tracer, take up a position in front of but out ofcontact with the record strip (notshown) .in its writing field. So longas the loose contact 7 9 just referred to remains in a state of rest, inengagement with fixed contact 81, the receiving pen will maintain theposition just referred to in front of but out of contact with the recordstrip,the branch cir cuit through the pen lifting magnet 73' be ingclosed by the contacts 79, 81. Means are provided, however, for, ineffect, openin this branch circuit while current is on the le t mainline, so that the pen lifter magnet 73 will be practically deenergizedand the receiving pen thus caused to move toward and into contact withits record strip, and to thereafter move over the surface of such stripso long as the transmitting tracer remains in contact with and movesover the platen 5 or paper strip thereon. The means provided for so 0ening this branch circuit throu h the pen ifter magnet will presently be(fescribed.

The condition of the loose contact 79" is controlled by the transmittintracer 6, so that when said tracer is raise from its rest at its unisonpoint, or is raised, from time to time, from the writing platen 5Jduringthe writing operation, the loose contact 79 will be in a state of rest aainst fixed contact 81 and, as just descri ed, the pen 72 be moved andheld away from itsresting place at unison or from the surface of itsrecord strip, as the case may be. When, however, the transmitting tracer6 is lowered, from time to time during the writing operation, intocontact with its record strip, this condition of loose contact 79 withrelation to fixed contact 81" is disturbed, said loose contact at suchtimes being in a state of agitation, with the result that the branchcircuit for pen lifter magnet 7 3 is repeatedly interrupted so that itsarmature 74F and pen-arm rest 76 are held retracted by the armaturespring (not shown) and pen 72 thus moved inwardly, by the resiliency ofits arms 71* into contact with its record strip or into its 5% restingplaceat unison, as the case may be, and Wlll retain such position solong as the transmitting-tracer 6 remains lowered and will thus, Whilein contact with its record strip, reproduce the movements of and.writing performed by the transmitting tracer.

The means. by which the condition of loose contact 79 relatively tofixed contact 81*.is thus controlled by the transmitting tracer 6Will-now be described. Referring particularly to Figs; 6 to 8, it willbe observed" that the tube is secured by a suitable socket "84? to .thecenter of a thin iron plate or diaphragm 85 provided with a flange 86 bywhich it is held in position on the upper end of relay 51. When saidrelay is energized by the current on left hand main line circuit, asheretofore described, it will at tract and pull downwardly slightly thecen tral portion of thedia hragm 85 and when it is deenergizedwill reease said diaphragm, tube 80, of course, moving with the diaphragm. Solong as the current passing through relay 51 is constant, loose contact79 will be in a position of rest with relation to and in engagement withfixed contact 81, and thus close the branch circuit through pen liftingmagnet=73t Should, however, vibrations occur in the current passingthrough the relay it will be apparent that I diaphragm 85 will berapidly vibrated, and

loose. contact 79 disturbed from its normal state of rest and put into astate of vibration or agitated with relation to fixed contact 8P, withthe result that the branch circuit through pen lifting magnet 7 3 willbe so interrupted that said magnet will be practically denergized andthe armature 74L thereof, as well as pen rest 76 therefore occupy theirretracted, rearward positions,

thus leaving the receiving p nermost position at unison, or against thesurface of itsrecord strip, as the case may be., Such; vibrations in theleft main line circuit are produced by the lowering of thetransmitting'tracer- 6, as will now appear.

Referring to'I ig.1,it will be observed that the transmitting instrumentis provided with an interrupter magnet 87 included in a local circuit ofbattery 4.- consisting of wire 27 from positive pole of battery 4,contact 25, plate 26 of master switch 3, contact 24, wires 23 and 28,wire 88 to contact 89,arn1ature 90, wire 91 leading therefrom to magnet87, wire 92 leading thence to'the primary winding 93'0fa'the inductioncoil, and wires 94 and l9leadin'g from the latter to the negative poleof battery 4 to ground. For the purpose of avoiding sparking at thecontact 89 and. armature 90, as the latter is repelled, a shunt circuit95 containing a condenser '96, is formed, from wire 88 to armature 90,around contact 89. It will also be observed that a short circuit isprovided around the primary winding 93 of the induction coil,

en 72 in its in-- consisting of wire 9? connecting wire 92 with acontact plate 98, pivotally mounted in a bracket 99 (from which it issuitably insulated), a contact 100 passing through but tact stop 100 andbreaking the short circuit around the primary-"winding 93 of theinduction coil. With these two circuits the interrupter magnet 87 andits armature 90 are operated continuously, through one or the other, solong as the master switch 3 remains in transmitting position (Fig. at)with its contact plate 26 connecting contacts 24%, 25.

In the raised position of-t-he transmitting tracer 6, the short circuitaround primary winding 93 of the induction coil is closed by theengagement of contact plate 98 and contact 100 under the platen 5, sothat the current from battery i does not pass through the primarywinding 93 but by wires 101, 20 and 19 to the negative pole of batteryi, no vibrations therefore being produced in the main line circuits.with the resultthat loose contact 79 in tube 80' (Fig. 2) abovecombination relay 51 will be at rest against fixed contact 81 and thusproperly close the circuit through pen lifting magnet 73 to cause it toattract its arnmt'ure 'Pi and move and hold the receiving pen 72 in itsouter position away from the surface of its record strip. When, however,the transmit ting tracer (3 is-lowered towriting position and thereforedepresses platen v 5, the contact plate 98 will be depressed (by pinl02)out of engagement with contact 100, thereby opening this short circuit.The interrupter current will thereupon pass, by wires 92, 94, and 19through the primary winding93 to the negative pole of battery at andthus in duce vibratory currents, superposed upon the right and left handwriting currents. Each time the tracer 6 is raised, primary winding '93is short circuited. The vibra tory currents thus traversing the two mainline circuits, while the transmitting traceris lowered, serve to vibrateslightly the operating parts of the receiver and thus overcome theirfriction of rest so that they may be more easily operated; while;thevibrations in the left hand main line serve the additional. function,heretofore referred to, of keeping the loose contact 79 (Fig. 2) abovecon'ibination relay 51 in a. state of agitation so that ,the pen liftermagnet circuit is interrupted and pen lifter magnet 73 practicallydecncrgized with the, result that its pressed thereby breaking contactwith conits writing platen to trace or write the nicearmature 745" andpen-arm rest 76 are retracted and permit receiving pen 7:2 to approachand rest against the surface of its record strip, which position it willretain, reproducing on'said strip the"writing produced by thetransmitting tracer, until the tracer (3 is again raised.

The armature 64: (Fig. 2) of relay 51 is of large area and comparativelythick, (being preferably of the dislrshape shown) so that, unlike thedelicate, loose contact 79 and tube S0,-it is unaffected by thesevibrations on the left main line circuit but, notwithstanding them,maintains contact plate 63 in engage ment with contact (35 and thusmaintains the circuit from battery 43, for field magnet 56 and lockmagnet- 60, closed. It will also be observed that in its normalretracted position, the free end of spring contact plate (3% restsagainst armature 64, being engaged by a contact 103 on the under side ofthe armature; While in its attracted or raised position, the armature ismoved away, from spring contact plate 623 leaving it in engagement withcontact which limits its upward movement, as shown in Fig.- 2.

It will, of course, be understood from the description above given ofthe devicesfor efiecting the to and fro moven'ients ofthc receiving penrelatively to its recording strip or place of rest at unison, and thebrief description preceding it of the devices for effecting the movementof the receiving pen over its recording strip to reproduce thewriting.-.performed by the transmitting tracer tliat, starting with thetransmitting tracer at unison or in its normal position, the firstmovement given it by the operator is to raise it and then move itlaterally to a position over the writing field of platen 5, and itwillalso be understood that the receiving pen will at'the same time bewithdrawn from its place or rest at unison? and then moved (as thetracer is moved) laterally to a position over the writing field of itsrecording strip; The transmitting tracer being then lowered onto platen5, the re ceiving pen will he moved inwardly intd contact with itsrecording strip, and the transmitting tracer being thenmov ed over sagethe receiving pen will'be correspondingly movcdover the surface of itsrecording stripreproducing thereon the writing pe formed by the tracer.When the tracer is raised to dot an i or cross a t or to make a changeor correction in matter pre' 'viously written or to begin a new line,the

incloscd in a receptacle comprising a pair of contacts loosely engagingeach other whereby, when vibrations occur, in the main line circuit, oneagitated relatively to the other and thus correspondinglv interruptssaid second circuit, substantially as described.

2. T he combination with a main line circuit, of a second circuit, andcircuit closing means controlling said second circuit and inclosed in areceptacle closed to the atmosphere, said circuit closing meanscomprising a pair of contacts loosely engaging each other whereby, whenvibrations occur in the main line circuit, one is agitated relatively tothe other and thus correspondingly interruits said second circuit,substantially as scribed.

The combination with a main line circuit, or" a relay controlledthereby, a second circuit, and circuit closing means controlled by saidrelay and in turn controlling said second circuit, said circuit closingmeans be ing inclosed in a receptacle closed to the atmosphere andcomprising a pair of contacts loosely engaging each other whereby, whenvibrations occur in the main line lrcuit, one is agitated relatively tothe other and thus correspondingly interrupts said secondcircuit,substantially as described.

4. The combination with a main line circuit, of a relay controlledthereby, a second circuit, circuit closing means controlled by saidrelay and in turn controlling said sec- 0nd circuit, a third circuit andcircuit closiug means therefor also controlled bythc' relay, said lattercircuit closing means comprising a pair ofcontacts loosely engaging eachother whereby, when vibrajions ()CCl'l'i' in the main line circuit, oneis agitated rela tively to the other and thus correspondingly interruptssaid second circuit, substantially as described.

In testimony whereof, l have hereunto set my hand, in the presence oftwo subscribin a witnesses.

